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The improvement and applications of EH-4 system data processing technique

HUA Xi-rui1,2,TANG Jing-tian2,ZHU Zheng-guo1,REN Zheng-yong21.The Forth Survey & Design Institute of China Railway,Wuhan,4300632.Central South University,Changsha,410083  
EH-4 system′s data processing mostly depends on IMAGEM which is manufacturer′s software.IMAGEM is inconvenient because of working in DOS interface,and has some disadvantages,such as low-resolution factor,asymmetrical frequency distribution,soit cannot effectively suppress disturbance.On the basis of studying EH-4 data processing,we ase a menthod to read time-sires file correctly,adopt periodogram means to recalculate auto-power spectrum,cross-power spectrum and tensor impedance component,and recalculate resistivity depend on tensor impedance component.We compile proprietary softwareEH-4 Data Processing Program.Because the quantity of reorganization impedance file is more 6 times than the original file,it enchances greatly vertical data density,resolution factor and credibility of data interpretation,According to actual EH-4 data analysis,the result is consistent with actual geological situation,.It proves that the program is feasible and valuable.
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